Coupling for bell and spigot pipes.



PATENTED MAY 28, 1907.

s. R.'DRBSSER. COUPLING FOR BELL AND SPIGOT PIPES.

APPLIU ATION FILED SEPT. 5.1906.

AltomeyS.

[NVENTOR outer or larger bell and the internal periph- UNITED STATES PATENT OE IO SOLOMON R. DRESSER, OF BRADFORD; PENNSYLVANIA, ASSIGNOR To S. R. DRESSER MANUFACTURING COMPANY, OF BRADFORD, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

COUPLINGFOR BELL AND SPIGQT PIPES;

I Specification of Letters Patent.

PatentedMay 28,1907.

Applicatibn filed Se tember 5, 1905'. Serial No. 277,075.

To all whom it may concern:

' Be it known that I, SOLOMON R. DRESSER, a citizen of the United States, residing at Bradford, in the county of McKean-and State of Pennsylvania, have invented certain new and useful Improvements in Couplings for Bell and S i ot Pipes; and I do hereby declare the ol owing to 'be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make-and use the same.

My present invention consists in the novel features hereinafter described, reference being had to the accompanying drawing which illustrates one form in which I have contemplated embodying the invention and said invention is fully disclosed in the following description and claims.

The object of my resent invention is to provide a non-leaka le joint for bell and spigot pi e in which no machine work on the pipe itse fis necessary.

The coupling herein shown and describedv is especially designed for a type of cast iron bell and spigot pipe known as Dresser special cast iron pipe in which the bell end '.of 'each pi e Section is rovided with two successive ells, the outer 'ell bein of greater diameter than the inner bell. he smaller or inner bell is adapted to receive the spigot endof an adjacent pipe section, and the larger bell is constructed to receive a packing ring between it and the said s igot, said ring being provided with an annu ar groove V-shaped in cross section, which is iengaged by a V- shaped end ortion of a sleeve or follower, provided wit a clamping ring or plate, surrounding the spigot end of the adjacent pipe section. A second clam ing ring surrounds the exterior of one of the ells, preferably the cry of said ring is provided with inwardly projecting lugs, or webs, which engage the ell at a number of Se arated points, and

distribute the strain of t e bolts more equa- "bly than would be the case where the ring itself is brought into direct contact with the bell. Clamping bolts connect the clamping ape end of the followerinto t e recess of the packing ring, forcing the rin to the bottom of the outer bell, and sprea ing the ring so as to force it into tight engagement ring? or lates and when tightened ress the j s- N s withthe outer surface of the spigot and the inner surface of the outer bell, thus making a 5 tight joint. i

It is to be noted that nospecial work is required upon either end of the pipe sections and this pipe can be manufactured at "the same price as any other'bell and spigot ipe, while the coupling produces therewii i a very tight and satisfactory joint.

My invention also includes certain detailsof construction hereinafter fully set forth.

In the drawings which accompany and form part of this specification, Figure 1 represents a perspectlve View of my improved coupling applied to the bell and spi ot of two ipe sections. Fig. 2 is a vertica longituinal sectional viewof the same. Fig 3 is a transverse vertical section on line 33 of Fig. 2. Figs. 4 and 5 are views of the two clamping rings. Fig. 6 is a'detail view of the rubber packing rin A, A re resent the two ipe sections to be connecte of which are sl fown, the bell end of one section and the spigot end of the other, it being understood that all of the pipe sections are of the same form. The section at the leftinthe drawing isshown as rovided with a hell 0 and a larger hell 0/, t e hell 0. receiving the S igotend a of the adjacent Section, while t e bell a! being of greater diameter, affords a acking recess in which is placed a packing ring B preferably of rubber.

It is tobe noted that the inner surface of the outerbell a curves outward shar 1y from the outer surface of the spigot, so t at the outer bell and the spigot o the adjacent I pipe section, and the curved bottom of the so formed packing. recess' The conforma-.

'tion of'theouter bell, thus securely holds the i packing ring and preventsit from being squeezed into the narrow space between the spigot and the wall of the inner end, which 100 would tend to crush and bruise the rubber and. deprive it of its elasticity.

The rin B has a'central hole to receive the 'spigote'n of the pibpe and is curved on its tofit the inner end of outer surface (as at the bell. On its front face" it is provided with an annular groove 6, V-shaped in cross section. The ring B is illustrated in detail in Fig. 6. s v

Thefollower comprises a clamping ring adapted to surround the spigot end of a pipe section andprovided with an annular flange or sleeve 0 projecting from the ring on one side, and adapted to pass into the packing recess of the bell a. The outer edge of the-flange c is V-shaped in cross section to fit into the V-shaped groove or recess 1) of the packing ring B as shown in Fig. 2f. The ring 0 is provided with a plurality of bolt holes 0 preferably oval in form to fit oval portions formed on the bolts E beneath the heads of the same, to prevent the'bolts from turning when the nuts are being screwed up, and the ring C is also provided with transversely or radially disposed reinforcing webs or flanges c 0 connecting the ring proper and annular flange c to give the construction great strength with the minimum of weight. These webs are preferably arranged in pairs and the bolt holes areconveniently arranged between the said pairs so that the ring is reinforced at the points of greatest strain.

D represents another clamping ring which engages the exterior'of the bell a of the pipe section, and is'jprovidedon-its interior with a plurality of projecting webs or studs d which directly engage the exterior of the bell. These lugs perform a very important function. Owing to the irregularities in the surface of the bell and clamping ring, if these lugs were omitted it would be almost impossible to secure .a proper or uniform distr1bution of the strain of the bolts around the bell, between it and the flange D, which would tend to cause the flange or hell, or both, to crack. By employing these lugs the clamping ring D can readily be placed so that all of these lugs will-contact with the exterior of the bell, notwithstanding any inequalities of 4 the adjacent surfaces and thus the strain of the bolts, which is exerted substantiallyin line with these lugs, isequally. distributed.

The ring D is provided with a central aperture which surrounds the bell a, and on its rear face is provided with inner and outer.

annular reinforcing flanges 11 d. The

flanges (1 (i are connected by transverse or radial webs d d? arranged in pairs around the ring. The ring D is also provided with a plurality'of' oval bolt holes"- d arranged preferably between thetsaid pairs of webs (i and corresponding with the bolt holes in the rm either end of the coupling.

I also prefer-that the bell engaging webs or .lugs d d shall be arranged inline with the As both rings are provided with the ova shaped holes/the bolts may be inserted from until the bell engaging webs a a are brought into contact with the exterior of the bell a and the ring C is placed on the spigot end of the next adjacent pipe section. A packing ring B is then placed on the said spigot, and the spigot is inserted in the bell a of the adjacent pipe section. The rubber packing ring B is forced into the bell a" or packing recess, and the clamping ring C is moved up to force the annular flange 0 thereof into the bell a and into'engagement with the packing ringB. The bolts E are now inserted and the nuts thereon drawn up so as to force the annular flange c of the ring C firmlyagainst the packing ring thus compressing it and making a right joint between the bell a and the spi ot of the adjacent pipe section.

It will be seen that when the follower is forced toward the bell, the flange c of the follower will enter the packing recess, and

com ress. the acking ring in a direction lon-' gitutinally o the pipe section, throughout its entire mass, thus compacting the ring and causirm it to expand transversely and press laterally with great, but elastic, pressure against the exterior surface of the s igot and the interior surface of the outer bell 0.. Owing to the fact that the bottom of the packing recess, so formed, is substantially perpendicular to the spigot, adjacent thereto, the rubber ring is prevented from being squeezed and mutllated between the spigot and the interior of the small hell (1 and thus the mass or body of the rubber is uniformly compacted and maintained in a state of uniform'compression, which tends to preserve thelife of the rubber and insure more perfectly the ti htnessofthe 'oint. It is also to be noted t at the wedge s aped end ofthe annular flange c of the follower entering the annular groove of the packing ring, also tends to compress the lateral portions of the rubber on the inner and outer sides of this groove against the bell a and the spigot a an'defl'ectually seals the packing ring within the acking'recess.

\ hat I-claim anddesire to secure by Letters Patent is '1. In a pipe coupling for bell and spigot pipe, the combinatlon with the packing ring, .of a clam mg rlng adapted to fit over the pi ot am provided with means for engaging s and compressing the packing ring,;a second. clamping ring adapted to surround the bell,

having It/ S interior surface provided with separated, inwardly extending be ring lugs for {directly en aging the exterior of the bell to distribute t e strain of said bolts around said ring and bell and clamping bolts connecting said clamping rings, substantially as described.

2. In a pipe coupling for'bell and spigot pipe, the combination with the packing ring, ofaclam ing ring adapted to fit over the spigot an provided with means for engaging said ring and bell, said second clamping ring 1 being. provided with bolt holes and said bearspigotan providedwith means for engagthe bell, provided onits inner face with inner and outer annular flanges, and relnforctodis tribute the strain of said bolts around. said ring and bell, said bearing lugsbeing. arranged closely adjacent tothose' portions of of each pair bein located on opposite sides' and compressing the packing ring, a second clamping ring adapted to surround the bell having its interior surface provided with separated, inwardly extending bearing lugs for directly engaging the exterior -of the bell the ring through which the bolts pass, for transmitting the strain ofthe bolts directly to the bell and bolts connecting said clamps ng rings, substantiallyas described.

3. In a pipe coupling for bell and spigot pipe, the combination with the packing ring, of a clamping ring adapted to fit over the spigotand provided withmeans for engaging an compressing the acking ring, a second clamping ring adapte to surround the bell,- having 1ts interior surface provided with separated, inwardly extending bearing lugs. for directly engaging the exterior of the bell. to distribute the strain of said bolts around ing lugs being arranged in pairs, and the lugs of one of the sai bolt holes, and clamping bolts passing through said bolt holes and connecting said clamping rings, substantially as described.

4. In a pipe coupling for bell and spigot pipe, the combination with the packing ring, of a clam ing ring adapted to fit over the ing and-compressingthe packing ring, a second clampmg ring adapted to surround ing webs connecting said flanges at intervals and having its interior surface provided with separated, inwardly extending bearing lugs in line with said' webs for directly. engaging the exterior' of the bell to.distribute the strain of the bolts around said ring and bell and bolts connecting said. clamping rings, substantially as described. l

5. In a pipe coupling for bell and spigot pipe, the combination .with the packing'ring, of a clam ing ring adapted to fit over the spi ot and provided with'means for engagin an compressing the packing ring, a secon clampin ring adapted to surround the bell provide on its inner face with concentric annular flanges, and reinforcing webs disposed substantially .radially, arranged in pairs around the rin and connecting said concentric flanges, t 1e ring proper being provided with bolt holes between, said webs,

the inner annular flange being providedon its interior face, with separated bearing lugs for I directly engaging the bell, to distribute the strain of the bolts around said ring and bell, each of said lugs being in line with one of said reinforcing webs, and bolts connecting said clam ing rings, substantially as described.

6. n a pipe coupling, the combination with the packing ring, of a clamping ring adalpted to fit over the pipe, and provided. wit a laterally extending sleeve for engaging the packing ring, and reinforcing webs connecting said ring and sleeve,- and arranged in pairs around the sleeve, said ring being provided with bolt holes between the webs of said pairs, and clamping bolts extending. .through saidboltholes, substantially as described.

7. The combination with two pipe sections', having their adjacent ends provided, the one with two successive'bells, the outer bell being of greater diameter than the inner, and the other with a spigot adapted to fit within the inner bell, and form a packing recess between the spigot and the outer bell, a packing ring fitting in said recess, and ,provided on its outer face with an annular groove, a clamping ring surrounding said spigot, and provided with a laterally extending sleeve, to engage said groove, and having reinforcing webs, connecting said sleeve and ring and-arranged in pairs around the.

rin the ring being providedwith bolt holes eac located between a pair of said webs, a second clamping ring surrounding one of said bells and bolts connecting said clamp ing rings, substantially as described.

1.8. The combination with two pipe sections, having their adjacent ends provided, the one with two successive bells, the outer bell being of greater diameter than the inner, -and the other with a spigot-adapted to fit Within the inner bell, and form a'packing recess between the spigot and the outer bell,

a packing ring fitting in said recess, and provided, on its outer face with an annular groove, a clam ing ring surrounding said spigot, and provided with a laterally extending sleeve, to engage said groove, and havmg reinforcing webs, connecting said sleeve and ring and arranged in pairs around the ring, the ring being provided with bolt holes each located between a pair of said webs, a

second clamping ring surrounding the outer bell, and havingits interior face'provided with separated, inwardly extending bearing lugs directly engaging the outer surface of said outer bell for distributing the strain of the bolts around said ring and bell, and bolts connecting said clamping rings, sub'stantially as described.

In testimony whereof I affix my signature, in the presence of two witnesses.

SOLOMON R. DRESSER.

Witnesses:

O. C. CoMFoR'r, JASPER M. Dnnssnn. 

